1.
captain, team leader
The leader of a sports team or group.
From English "captain." In Japanese, キャプテン is used almost exclusively for sports team leaders, not for ship or military captains.
Usage by context
Common patterns
The word is sometimes shortened to キャプ in casual speech among teammates. In school sports, 部長 (club leader) may be used instead of キャプテン depending on the sport and school.